Assaf Bern
Senior Software Developer at Starburst
Israel
Summary
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Rockstar🎓
Top SchoolAssaf Bern is a senior software developer in Israel with a decade of experience building high-scale backend systems and distributed services from scratch to production. He has driven backend architecture and performance work across startups and enterprise storage—shaping multithreading, clustering, transaction recovery, and cloud-native microservices at companies like Starburst, Varada, INFINIDAT and an early-stage Redkix (acquired by Facebook). Assaf contributes to notable open-source projects such as the Trino distributed SQL engine, where he improved connector expression translation and fixed subtle casting and predicate-translation issues. Comfortable across JVM and polyglot backends, he brings hands-on expertise with Elasticsearch, PostgreSQL, AWS services and large-scale data infrastructure. His practical-engineering background and high academic marks reflect a methodical approach to solving complex reliability and performance challenges.
9 years of coding experience
11 years of employment as a software developer
Practical Engineer, Computer Science, 96, Practical Engineer, Computer Science, 96 at Gimnasia Realit Rishon Le Zion CollegeB.Sc., Computer Science, 92, B.Sc., Computer Science, 92 at The Open University of Israel
Stackoverflow
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Github Skills (18)
data-connector10
query-builder10
back-end-development10
connections10
java10
javas10
data-connectors10
sql10
connectors10
query-engine10
big-data9
databases9
database9
distributed-database9
data-structures8
Programming languages (1)
Github contributions (4)
trinodb/trino
Aug 2022 - Dec 2022
Official repository of Trino, the distributed SQL query engine for big data, formerly known as PrestoSQL (https://trino.io)
Role in this project:
Back-end Developer
Back-end DeveloperContributions:233 reviews, 5 commits, 44 PRs in 3 months
Contributions summary:Assaf primarily refactored and enhanced the Trino query engine codebase. Their contributions focused on renaming and adjusting internal components, specifically changing references from "inputs" to "arguments" in the `AggregateFunction` class and related code. Additionally, the user improved the connector expression translation logic for the Elasticsearch connector and implemented the translation of BETWEEN predicates into connector expressions. Furthermore, they optimized code to prevent potential casting issues, specifically addressing a case involving `is_nan()` and REAL types.
prestodbdbmsindexingjdbcbigdata
assaf2/trino
May 2021 - Jan 2024
Contributions:209 pushes, 35 branches in 2 years 8 months
bigdatabig-datatrinodatabasehadoop
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